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Patent Searching and Data


Title:
CHARGEABLE ELECTRIC POWER TOOL
Document Type and Number:
WIPO Patent Application WO/2006/075524
Kind Code:
A1
Abstract:
A chargeable electric power tool is equipped with an alerting device that monitors the voltage of a power supply battery and puts out an alert by means of an LED or buzzer when the power supply voltage drops below a reference voltage. However, it is arranged that even during the alert, no interruption of the power supply to the motor be performed but a normal operation be executed by accepting an activation operation via a trigger switch. This arrangement allows the chargeable electric power tool to operate even when an alert occurs due to a voltage drop under a low temperature, and hence improves the usability and operational efficiency as compared with an arrangement in which the power supply to the motor is interrupted upon occurrence of an alert. Additionally, when it is determined that a memory effect occurs in the battery, the activating operation is repeated until the motor becomes unable to be activated after occurrence of a voltage alert, thereby discharging the battery below a discharge termination voltage to cancel the memory effect.

Inventors:
KUSAKARI ICHIRO
NAGAOKA TAKAHIRO
ITAGAKI OSAMU
MATSUOKA ATSUSHI
Application Number:
PCT/JP2005/023942
Publication Date:
July 20, 2006
Filing Date:
December 27, 2005
Export Citation:
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Assignee:
MAX CO LTD (JP)
KUSAKARI ICHIRO
NAGAOKA TAKAHIRO
ITAGAKI OSAMU
MATSUOKA ATSUSHI
International Classes:
B25F5/00
Foreign References:
JP2005246563A2005-09-15
JP2005001039A2005-01-06
JPS61148570U1986-09-12
JPH07161340A1995-06-23
JPH03165267A1991-07-17
JP2004261909A2004-09-24
JPS59169387A1984-09-25
US5657417A1997-08-12
DE4204420A11993-08-19
JPH0526278U1993-04-06
JPH071350A1995-01-06
JP2005004644A2005-01-12
Other References:
See also references of EP 1837129A4
Attorney, Agent or Firm:
Oguri, Shohei (7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, JP)
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